[antlr-interest] Problem catching exceptions in c# generated code

[Johannes Luber]

Ed Sykes schrieb:
> 
> I've just tried moving the try catch into the lexer around the call to 
> Antlr.Runtime.Match() and this seems to catch the exception. I'm 
> confused as to why putting the code in the driver doesn't work, but 
> moving the try catch to the lexer does.
> 
> at least i have a workaround if i can't figure out how to get it working 
> in the driver.

Now I believe I know what's your problem actually is. You are getting 
exceptions in the lexer, but you aren't catching them because the catch 
clause doesn't include the lexer. That would make sense as the lexing is 
done separately from the parsing. There only one problem with the 
theory: FillBuffer() is called by NextToken() is called by the parser. 
So the exception should be on the call chain. Strange. Nonetheless test 
it, because changing the generate code is always a bad idea, if there is 
an other way.

And to your other question in the other email: ANTLR has a special 
syntax for exceptions in its grammar, but that doesn't work yet.

Johannes